Illegal characters in chat

So.. this is the code of a spigot ChatComponent.

Code:

    public void Solicitud(Player p1, Player p2) {
        TextComponent message = new TextComponent( ChatColor.GOLD + "test");
        TextComponent si = new TextComponent("[SI]");
        si.setColor(ChatColor.DARK_GREEN);
        si.setBold(true);
        si.addExtra("");
        si.setClickEvent(new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/test add " + p1.getDisplayName()));
        TextComponent no = new TextComponent(" [NO]");
        no.setColor(ChatColor.RED);
        no.setBold(true);
        no.setClickEvent(new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/test deny" + p1.getDisplayName()));
        p2.spigot().sendMessage(message, si, no); 
    }

And the problem is, When i do the click in the message json (/test add or /test deny) the server kick to me and appear in the chat "Illegal characters in chat". Dont really know why appear, but i can fix that removing "getDisplayName" from "blabla.(ClickEvent.Action.RUN_COMMAND, "/test deny" + p1.getDisplayName());

 

What are the players' display names?

 

Well, you first need a space after /test deny " " p1.getDisplayName().

Also can you send a gif or a picture of trying it so we get the full picture?

 

Remove the '/' at the beginning of your command.